5篇
您的检索式：作者名="QIAO HongChao"
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| 1 | Experimental investigation of laser peening on TiAl alloy microstructure and properties显示文摘In order to study the effect of laser peening on microstructures and properties of Ti Al alloy, Ti Al alloy samples were treated by Nd:YAG laser system with the wavelength of 1064 nm,pulse-width of 18 ns, and pulse-energy of 0–10 J. Surface micro-hardness, roughness, and microstructural characteristics were tested with micro-hardness tester, roughness tester and scanning electron microscope. Residual stress and pole figures were tested with X-ray diffraction and its high-temperature stability was analyzed. The experimental results show that surface micro-hardness increases by up to 30%, roughness increases to 0.37 lm, compressive residual stress increases to 337 MPa, and local texture and typical lamellar microstructure are generated. Residual stress, micro-hardness, and(002) pole figures tests are conducted, compressive residual stress value drops from 337 MPa to 260 MPa, hardness value drops from 377 HV_(0.2) to 343 HV_(0.2), and the(002)poles shift back to the center slightly. Laser peening improves microstructure and properties of Ti Al alloy significantly. | Qiao Hongchao Zhao Jibin Gao Yu | 2015 | Chinese Journal of Aeronautics2015，28，2： | 21 |
| 2 | Acoustic wave detection of laser shock peening显示文摘 | Jiajun Wu Jibin Zhao Hongchao Qiao Xuejun Liu Yinuo Zhang Taiyou Hu | 2018 | Opto-Electronic Advances2018，1，9： | 3 |
| 3 | Study and development of high peak power short pulse Nd:YAG laser for peening applications显示文摘Because short pulse Nd:YAG laser of nanosecond pulse-width and high peak power has a unique capability to improve the mechanical properties of metal parts,a study on the development of high peak power short pulse from Nd:YAG laser along with its peening application has been performed.The design scheme of laser and the characteristic of laser beam transmission are presented and discussed.A pulse energy of 25 J with 15 ns pulse-width and a maximum peak power of 1660 k W laser system which use one oscillation and eight amplifiers has been achieved.Laser beam has a max divergence angle of 0.03 mrad,a pulse-to-pulse pulse-width stability of±0.1 ns,and the pulse-to-pulse energy stability factors of less than±2.8%.A low value of divergence means an easier modification of a nearly hat-top laser beam intensity profile and an easier transmission of laser beam.To evaluate the performance of the laser system,several metal materials are processed.Laser peening quality and efficiency are analyzed by using an optical microscope,a transmission electron microscope,and an X-ray diffraction device.The processing results show that the performance of this laser system is excellent. | QIAO HongChao ZHAO JiBin YANG Hao | 2015 | Science China(Technological Sciences)2015，58，7： | 2 |
| 4 | Plasma assisted thermal bonding for PMMA microfluidic chips with integrated metal microelectrodes显示文摘 | Junshan Liu Hongchao Qiao Chong Liu Zheng Xu Yongqian Li Liding Wang | 2009 | Sensors & Actuators: B Chemical2009，，2： | 1 |
| 5 | The laser shock processing control system显示文摘 | Ying Lu Jibin Zhao Hongchao Qiao | 2017 | 光电工程2017，44，8： | 0 |
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